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The Epic Interactive Encyclopedia 1998
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Epic Interactive Encyclopedia, The - 1998 Edition (1998)(Epic Marketing).iso
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Endoplasmic_reticulum
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1992-09-02
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17 lines
(ER) a membranous structure in eukaryotic
cells. It stores and transports proteins
needed elsewhere in the cells and also
carries various enzymes needed for the
synthesis of fats. The ribosomes, which carry
out protein synthesis, are attached to parts
of the ER. Under the electron microscope, ER
looks like a series of channels and vesicles,
but it is in fact a large, sealed, baglike
structure crumpled and folded into a
convoluted mass. The interior of the `bag',
the ER lumen, stores various proteins needed
elsewhere in the cell, then organizes them
into transport vesicles formed by a small
piece of ER membrane budding from the main
membrane.